Fluid injecting drill



Jan. 1963 P. KUHL FLUID INJECTING DRILL 2 SheetsfSheet l Filed Dec. 20, 1960 INVENTOR. aff

ATTOR N EYS.

WM 5M@ Jan. l, 1963 P, KUHL FLUID INJECTING DRILL 2 Sheets-Sheet 2 Filed D80. 20, 1960 efvf BY ATTORNBS.

United dtates Patent Oiice Patented dan. l, i963 3,071,266 FLUID @MEETING DRILL Fete Kuhl, 507 W. Walnut Si., .Iunetion Cit Kans. Filed Dec. 2li, 1960, Ser. No. 77,162 l Claim. (El. WSU-207) This invention relates to a tool, and more particularly to a fluid injecting drill which is especially useful in the eld of termite control.

It is an object of the present invention to provide a tool that includes a member that is adapted to be rotated by a convenient source of power such as a rotary drill, and wherein according to the present invention a controlled amount of fluid is adapted to be discharged in the vicinity of the cutting tip of the tool.

It is another object of this invention to provide a cornbination tool of the character stated which can be used in the field of termite control and wherein the tool of the present invention can be used as a soil injector, chemical injector for rock foundation walls, and as a back wash concrete drill and a concrete sub-slab injector, the tool of the present invention utilizing the principle of injecting a liquid chemical into the soil and into semi-solid rock walls for the prevention and control of subterranean termites.

It is a further object of this invention to provide a tool of the character described which is rugged and solid and inexpensive to make.

Other objects and advantages will in part be obvious and in part will be pointed out hereinafter.

The invention accordingly consists'in the features of the construction, combinations of the elements and arrangement of parts which will be exemplified in the device hereinafter described and of which the scope of application will be indicated in the appended claims.

ln the accompanying drawings in which it is shown one of the various possible embodiments of the invention:

FIGURE l is a side elevational view of the combination tool of the present invention, with parts broken away and in section.

FIGURE 2 is an enlarged fragmentary sectional view illustrating certain constructional details of the present invention.

FIGURE 3 is a sectional view taken on the line 3-3 of FIGURE 2.

FIGURE 4 is a fragmentary sectional view illustrating the adjustable stop mechanism.

FIGURE 5 is a sectional view taken on the line 5-5 of FIGURE 4.

FIGURE 6 is a sectional View taken on the line 6--6 of FIGURE 4.

FIGURE 7 is an enlarged sectional view showing certain constructional details of the drill point and its adjacent parts.

FIGURE 8 is a bottom plan view of the drill fixture showing the cutting tip in the lower portion of the drill point.

FIGURE 9 is a fragmentary elevational View showing a portion of the device of FIGURE 7 in elevation.

FIGURE l0 is a View taken at right angle to the view shown in FIGURE 9.

FIGURE ll is a sectional view taken on the line l1ll of FIGURE l0.

Referring in detail to the drawings, the numeral 2d indicates the combination tool of the present invention which embodies a rotary shaft 2l that is adapted to have its upper end 22 connected to a chuck 23 of a power driving mechanism such as conventional rotary electric drill 24, FIGURE l.

The numeral 25 indicates a collar which is mounted on the upper portion of the rod 2i, FIGURE 2, and the collar 25 is held in place by means of a set screw 2d.

As shown in the drawings, there is provided a body member which is indicated generally by the numeral 27, and the body member 27 includes an upstanding portion 2S as well as a depending portion 29, and the body member 27 further includes a laterally extending neck or fitting 30. A hose or conduit 31 is adapted to be connected to the fitting 30, and the conduit 3l has a control valve 32 therein, and the control valve` 32 may be provided with a knob or handle portion 33 whereby the iiow of fluid such as a chemical from a source of supply through the portion 34 of the conduit and into the portion 31 can be controlled or regulated as desired.

As shown in FIGURE 2, packing is arranged in the upper portion 28 of the body member 27 and this packing includes an upper compression sleeve 35 as well as intermediate packing material 36, and a lower self lubricating bushing 37, and the numeral 3S indicates a fastener or nut which is threadedly engaged with the upper end of the body member 27, the fastener 3S being provided with a central aperture opening for the projection therethrough of the shaft 21. The depending portions 29 of the body member 27 is spaced from the shaft 21 so as to define or provide a clear space 39 for a purpose to be later described.

As shown in the drawings, there is provided a hollow housing or casing 4l which is arranged so that the shaft 21 can rotate within the housing All, and there is defined or provided a clearance space 42 between the shaft 21 and the housing 4l, and this clearance space 42 communicates with and is adapted to receive fluid from the clearance space 39, as for example as shown in FIGURE 2. The upper end of the housing 4l is suitably affixed to the depending portion 29 of the body member 27.

The numeral 43 indicates a stop mechanism which comprises a frustro-conical base element Lili, and there is provided a bushing d5 which is iixedly mounted within the base element d4, FIGURE 4. A tubular sleeve i6 of yieldable material such as rubber, plastic or the like has its lower portion xedly secured to the base element 4d, and the numeral 47 indicates a bracket which includes a curved portion 48 that surrounds or engages a portion of the sleeve 46, FIGURE 5. The bracket i7 further includes a pair of spaced parallel leg portions 49 as well as a crosspiece Sil, and the numeral 51 indicates a screw member which adjustably or threadedly engages the cross* piece Si), and an arcuate or curved clamp S2 is connected to the inner end of the screw member 51 for engaging the yieldable sleeve 46. j

The lower end of the shaft 21 is threaded as at S3, and this lower threaded end 53 is arranged in threaded engagement with the threaded socket 5d in a drill point 55, and the drill point 55 is provided with a space 56 which communicates with the clearance spiace 42, and there is also provided in the upper portion of the drill point 55 a recess or groove 57 which is adapted to receive fluid or chemical from the space 56. There is a rotatable connection between the bit or drill point 55 and the housing I and wherein there is provided a swivel joint that permits relative rotation between the shaft and housing. A pair of passageways or openings 58 are arranged in the drill point 55, and the passageways S8 serve to establish communication between the recess 57 and a pair of diametrically opposed cutouts or openings 59 that are formed or provided in the lower portion of the drill point 55. The numeral 60 indicates a cutting tip which is arranged in the lower portion of the drill point 55, and the cutting tip 64I includes opposed side cutting edges 61 as well as inclined lower cutting edges 62 and a depending pointed portion 63.

From the foregoing, it is apparent that there has been provided a tool which is adapted to be used for simultaneously drilling a hole and injecting a iiuid into a particular location, and with the parts arranged as shown in the drawings, it will be seen that the shaft 2l is adapted to have its upper end 22 suitably fastened to a chuck such as the chuck 23 or a conventional electric drill 24. The conduit portion 34 is adapted to be connected to a suitable source of supply of fluid, chemical or the like, and by manually actuating the valve 32 as for example by compressing the knob 33, tiuid can be permitted to iiow from the conduit portion 34 through the valve 32 into the conduit portion 31, and this fluid will then tiow through the fitting 3G into the space 39. The fluid will then flow from the space 39 down through the clearance space 42 between the housing 4l and shaft 2l, and this fluid will then flow down through the space 56 and into the recess 57. The duid will then flow from the recess 57 down through the passageways or openings 58 and this iiuid will be discharged out through the pair of opposed openings 59 in the vicinity of the cutting tip 6d.

As the drill 24 is actuated, the shaft 2l will be rotated and the shaft 2l will rotate within the body member 27, and the shaft 2l will also rotate within the housing7 dll. In view of the fact that -the drill point 55 is connected to the lower end of the shaft 2l, thus rotation of the shaft 21 will result in the rotation of the drill point 55, and in view of the fact that the tip 60 is suitable atiixed to the drill point 55, it will be seen that the tip dit will be rotated. The tip 60 is provided with the cutting edges such as the cutting edges 6l and 62 so that the material being drilled can be readily cut through by the tip, and during this cutting lby the tip the Huid will be discharged out through the openings 59.

The collar 25 is fastened to the shaft 2l as at 26 so that the collar 25 will abut or engage the fastener 33 in order to provide a stop means for limiting downward movement of the shaft 2l in the body member 27. By loosening the set screw 26, the collar 2S can be shifted to a. desired position on the shaft 2l, and then the set screw 26 can be tightened in order to maintain the collar 25 immobile in the desired position or location.

The stop mechanism 43 includes the frustro-conical base element or base piece d4 which is adjustable on the housing 41. Thus, by loosening the screw member l, the sleeve d6 and base piece 44 can be shifted up or down on the housing All, and then the screw member 51 can be tightened in order to cause the clamp 52 to move into engagement with the yieldable sleeve 46 so that sufficient pressure will be exerted by the sleeve 46 against the housing 41 in order to prevent accidental shifting of the stop mechanism d?, from its adjusted location or position.

Suitable material can be used for making the various elements or parts and these elements or parts can be made in different configurations or shapes or sizes.

The openings such as the openings 58 are arranged so that soil or the like will be prevented from clogging these openings or holes.

The tip 6i) may be of a tungsten carbide type of tip, and the drill point 55 may be made of a suitable material such as carbon steel. The unit 43 functions as a depth gauge and hole stop, and the member 44 may be made as an aluminum casting. The body member 27 may be made as a brass casting, and the shaft 2l and housing 4l may be made of a suitable material such as stainless steel.

It will therefore be seen that according to the present invention there has been provided a combination tool which is especially useful in the field of termite control and the tool of the present invention as indicated by the numeral 2t) is adapted to be used as a soil injector, chemical injector for rock foundation walls, and as a back wash concrete drill and a concrete sub-slab injector and the principal use of the tool is to inject a liquid chemical into the soil and into semi-solid rock walls for the prevention and control of subterranean termites.

In use of the tool, the tool is adapted to be attached to the chuck of an electric drill and a pressured chemical hose or conduit such as the conduit 31 is attached as shown in Pf6-URB l by placing the tool in a vertical position with the point or tip et) against the ground, and with the electric drill rotating the drive shaft 2l., the point 55 and tip 68 will be rotated and by applying the downward pressure of the tool against the ground and at the same time opening the valve 32, chemical liquid will enter the tool under pressure and force its way around the drive shaft 2l and down the inside of the housing from the space 359 through the space d2. This fluid will come out the escape holes 55 in the lower end of the drill point 55' so that the toc-l stem can be readily pushed into the ground until it comes to the adjustable depth gauge and holestop 43. By continuing a downward pressure of the tool into the ground, and with the chemical on and the drill orf, the hole stop will be made to cap or plug the top of the hole so as to force the chemical into the soil in all directions.

in addition, the tool of the present invention is eX- tremely effective for drilling concrete of extreme thickness. Thus, daring concrete drilling, when the chemical is removed through the tool, the drilling residue will be kept washed away from the drill point and up out of the hole, so as to keep the drill point clean and free drilling and at the same time the chemical keeps the drill point cool and lubricated so as to reduce wear on the point to a complete minimum. In addition concrete has a tendency to drill much easier and faster when kept wet, and with the present invention, wear on the drill point will be greatly reduced so that ythe drill point will have increased usage or longer life.

In addition, the depth of the hole does not have any effect on the emciency of the drill since as the drill point is clean and free at any depth. Thus, there will be .extreme cutting ease and efficiency of the tool since it is powered with only a regular drive electric drill.

In drilling concrete with a regular concrete drill and after a depth of about four inches is reached, drilling becomes quite diiicult since the drill bit is unable to properly augur the residue out of the hole and as a result the drill begins to bind, wedge, and heat which drops the drilling etliciency to near zero. With the present invention even the last portion of drilling will be able to be accomplished quickly and eiiiciently, and with sufcient downward pressure applied the drill will readily cut through concrete quickly and conveniently and etiiciently.

The conventional or regular soil injectors which are presently available on the market at the present time, are practically impossible to use in hard soil, around tree roots or in rocky soil or where scrap lumber and debris has been left in the soil which is commonly found around the foundation of a building, but none of these conditions will prevent the tool of the present invention from operating etiiciently.

The tool of the present invention is especially suitable and convenient for use by persons working in the tield of control of termites, pests, rodents, or the like.

The member d5 functions as a wear surface or bearing for the adjustable base piece 44. As shown in FIGURE l0, for example, the lower ends of the passageways 58 terminate at points contiguous to the cutouts or openings S9 so that the tiuid can discharge at the proper location.

Minor changes in shape, size and rearrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

What is claimed is:

A liuid injecting drill comprising a vertically disposed shaft, a collar mounted on the upper portion of said shaft,

a body member mounted on said shaft below said collar and said body member including an upstanding portion and a depending portion and a laterally arranged fitting, a valve controlled conduit connected to said fitting for supplying fluid from a source of supply, a fastener mounted on the upper end of the body member, there being a clearance space between said shaft and the lower depend.-

ing portion of the body member, a hollow housing surrounding said shaft and the upper end of said housing being fastened to the lower portion of the body member, there being a clearance space between said housing and said shaft which communicates with the clearance space in the dependingy portion of the body member; a stop mechanism including a base element of frustro-conical formation mounted on said housing, a tubular sleeve of yieldable material having its lower end affixed to said base element, a bracket including a curved portion engaging said sleeve, a screw operated clamp carried by the bracket for engaging the sleeve, a drill point connected to the lower end of the shaft, there being a recess in the upper portion of said drill point for receiving iluid from the clearance space between the housing and shaft, the lower portion of the drill point being provided with a 6 pair of opposed openings, there being passageways in said drill point establishing communication between said recess and openings, and a cutting tip in the lower portion of the drill point.

References Cited in the tile of this patent UNITED STATES PATENTS 1,234,097 Gilman July 17, 1917 1,816,324 Hansen July 28, 1931 1,964,064 Karshner June 26, 1934 2,323,773 Irish July 6, 1943 2,964,115 Clatfelter Dec. 13, 1960 FORElGN PATENTS 233,400 Australia Apr. 23, 1959 

